80361257 has 2 divisors, whose sum is σ = 80361258. Its totient is φ = 80361256.

The previous prime is 80361251. The next prime is 80361283. The reversal of 80361257 is 75216308.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 80209936 + 151321 = 8956^2 + 389^2 .

It is a cyclic number.

It is not a de Polignac number, because 80361257 - 2²⁴ = 63584041 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (80361251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40180628 + 40180629.

It is an arithmetic number, because the mean of its divisors is an integer number (40180629).

Almost surely, 2^80361257 is an apocalyptic number.

It is an amenable number.

80361257 is a deficient number, since it is larger than the sum of its proper divisors (1).

80361257 is an equidigital number, since it uses as much as digits as its factorization.

80361257 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 80361257 is about 8964.4440429956. Note that the first 3 decimals coincide. The cubic root of 80361257 is about 431.5345513479.

The spelling of 80361257 in words is "eighty million, three hundred sixty-one thousand, two hundred fifty-seven".